Just came accross this, I reccomend avoiding fortified foods and ceriels. The iron they often use is not in a digestable food from a food source but is in fact Iron filings. Check out the following video, you shouldn’t be able to move your food with a magnet. They even extract the iron fillings.
![](https://www.cambridgefitness.co.uk/wp-content/uploads/2016/10/84.jpg)